Shock-wave and conventional deformation of Al and dispersion-hardened Al alloy containing different concentrations of alumina particles

The structure and substructure changes in Al and dispersion-hardened Al alloy are studied after rapid deformation by explosion and slow conventional deformation (cross-rolling and compression) using X-ray diffraction analysis and transmission electron microscopy. Shock wave deformation generates a small dislocation density which does not produce any significant change in the microstructure as well as in the texture of Al and Al alloy containing a different concentration of Al2O3 particles (4 and 7%). After slow conventional deformation, in particular after cross-rolling, significant variations are observed due to the nonuniformly distributed high dislocation densities.